From d4f132b716a6cdbc3a6a521a21fd2811c9da3480 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 2 Jul 2026 01:38:24 -0400 Subject: feat(flush): add auto mode with self-injected /clear for unattended runs Long autonomous sessions bloat or hit auto-compaction because /clear is a prompt keystroke no tool call can execute. Auto mode closes that gap: after the write-verified checkpoint, the agent derives its own tmux pane, arms self-inject.sh through tmux run-shell -b, and ends the turn so /clear and a resume line land at an idle prompt. The server-owned arm is load-bearing: a detached child of a tool call dies at the turn boundary. The pane must be derived before arming because ancestry detection can't work under the tmux server. self-inject.sh joins the synced scripts with a six-test bats suite, tmux stubbed at the boundary. work-the-backlog now auto-flushes between tasks when context grows heavy, and its speedrun preset gained the per-item disposition rule: feature-level work gets a spec, unguessable decisions get a VERIFY, well-defined tasks get implemented. The mechanism was proven live in another project's session and its design note is preserved under docs/design/. --- .ai/scripts/self-inject.sh | 68 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100755 .ai/scripts/self-inject.sh (limited to '.ai/scripts/self-inject.sh') diff --git a/.ai/scripts/self-inject.sh b/.ai/scripts/self-inject.sh new file mode 100755 index 0000000..e7340c1 --- /dev/null +++ b/.ai/scripts/self-inject.sh @@ -0,0 +1,68 @@ +#!/bin/sh +# self-inject.sh — type text into the tmux pane running this agent session. +# +# The building block for AUTO-FLUSH: an agent checkpoints its session-context, +# then has tmux type "/clear" and a resume prompt at its own idle prompt, so a +# session flushes with no human at the keyboard. +# +# Usage: +# self-inject.sh -t %PANE [ ...] +# self-inject.sh [...] # derive pane from ancestry +# self-inject.sh [-t %PANE] # no pairs: report the pane +# +# Each pair: sleep seconds, then type literally and press Enter. +# +# TWO HARD-WON GOTCHAS (2026-07-02, archsetup session): +# 1. A detached child (setsid/nohup/&) of an agent tool call DIES when the +# tool call ends — the harness cleans up the process group. The arm step +# must run under the tmux SERVER instead: +# tmux run-shell -b "self-inject.sh -t %1 25 '/clear' 15 'go — resume...'" +# 2. Under tmux run-shell the process is a child of the tmux server, so +# ancestry-based pane detection CANNOT work there. Derive the pane FIRST, +# synchronously from the agent's own shell (no -t), then pass it +# explicitly with -t when arming. +# +# Collision hazard: if the user happens to be typing when the send fires, the +# injected text merges into their input line (a real /clear became "/clearto" +# mid-word). Auto-flush is for sessions running unattended; warn the user to +# keep hands off for the armed window if they're present. + +PANE="" +if [ "$1" = "-t" ]; then + PANE=$2; shift 2 +fi + +ppid_of() { + # /proc//stat: pid (comm) state ppid ... — comm may contain spaces, + # so take the 2nd field after the LAST ')'. + stat=$(cat "/proc/$1/stat" 2>/dev/null) || return 1 + # shellcheck disable=SC2086 # word-splitting the stat tail is the point + set -- ${stat##*) } + echo "$2" +} + +find_pane() { + anc=" " + pid=$$ + while [ -n "$pid" ] && [ "$pid" -gt 1 ] 2>/dev/null; do + anc="$anc$pid " + pid=$(ppid_of "$pid") || break + done + tmux list-panes -a -F "#{pane_pid} #{pane_id}" 2>/dev/null | \ + while read -r ppid pane; do + case "$anc" in *" $ppid "*) echo "$pane"; break;; esac + done +} + +[ -n "$PANE" ] || PANE=$(find_pane) +[ -n "$PANE" ] || { echo "self-inject: no owning pane found (pass -t %PANE)" >&2; exit 1; } + +# With no delay/text pairs, just report the pane (the derive-first step). +[ $# -ge 2 ] || { echo "$PANE"; exit 0; } + +while [ $# -ge 2 ]; do + sleep "$1" + tmux send-keys -t "$PANE" -l "$2" + tmux send-keys -t "$PANE" Enter + shift 2 +done -- cgit v1.2.3